Mark on Canon vs Legends Luke
I think this radical change can be explained by the desire of the studio to surprise the viewer with something new. A lot of books, comic books and games were published on Star Wars, my son got acquainted with most of them and told how strong Luke was in them. So much so that, perhaps, with the help of the Force, you can control a dozens lightsabers simultaneously. I remember thinking that if they decide to show it like that in the new episodes, then I do not have to do anything at all - I'll just have to stand before the green screen and wave with my hands, and the rest will be painted with the help of computer effects. And then, when I offered some ideas, I was often told that it was already in a book or a comic book. And the studio wanted to show Luke the way he had never been seen before.
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Translated from a Russian interview.